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Finding the Fourth Proportional to 612.86, 845.11 and 426.56

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Solution

The fourth proportional to 612.86, 845.11 and 426.56 is: 588.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.86 : 845.11 = 426.56 : x
  2. Step 2: Convert to fraction form
    612.86/845.11 = 426.56/x
  3. Step 3: Cross multiply
    612.86x = 845.11 × 426.56
  4. Step 4: Simplify right side
    612.86x = 360,490.12
  5. Step 5: Solve for x
    x = 360,490.12/612.86
  6. Step 6: Final answer
    x = 588.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.